【Hidden Password & Error Prevention】 The password is hidden at the bottom of the lock. To change it, unscrew and push the setting key upwards until you see the \"SET\" key, then reset the password. This effectively avoids accidentally changing the password and being unable to open the lock. 【One-Button Locking】 The lock's original password is 0-0-0-0. After setting your password, simply press the middle button to open the lock, making it incredibly convenient to use. Note: Take a photo to record your new password after changing it to avoid being locked out. 【Strong Security Performance】 Features a plastic lock body, one-piece alloy, 304 stainless steel lock hook, and an 8mm pick-resistant shackle. It cannot be manually removed or broken, effectively preventing cutting and prying. The 4-digit metallic password wheel offers 10,000 password combinations for a high level of theft protection. 【Unique Appearance Design】 The square shell design is simple and elegant. The lock's surface has a non-slip texture, providing a great feel. Weighing only 270g, it's small and easy to carry. 【Wide Range of Uses】 Suitable for indoor and outdoor locations such as doors, fences, garages, toolboxes, cabinets, school lockers, gym lockers, etc. It's a great choice for personal use and as a gift.